WO1989009509A1 - A mounting structure for an electric motor - Google Patents

A mounting structure for an electric motor Download PDF

Info

Publication number
WO1989009509A1
WO1989009509A1 PCT/US1989/000899 US8900899W WO8909509A1 WO 1989009509 A1 WO1989009509 A1 WO 1989009509A1 US 8900899 W US8900899 W US 8900899W WO 8909509 A1 WO8909509 A1 WO 8909509A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing portion
mounting flange
mounting structure
motor
mounting
Prior art date
Application number
PCT/US1989/000899
Other languages
French (fr)
Inventor
Thomas J. Bossack
Original Assignee
Ncr Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ncr Corporation filed Critical Ncr Corporation
Publication of WO1989009509A1 publication Critical patent/WO1989009509A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/02—Framework
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports

Definitions

  • the present invention relates to a mounting structure for an electric motor having a mounting flange and more particularly, but not exclusively, to a mounting structure for mounting an electric motor to the frame of a printing apparatus.
  • a printing apparatus it is known for a printing apparatus to require one or more electric motors to drive certain parts of the printing apparatus.
  • a small motor to drive the print head carriage in recip ⁇ rocating manner.
  • a second motor is used to drive the paper such as a receipt, a slip or a journal at the end of the printing operation.
  • a mounting structure having a mounting flange, characterized by a housing portion for receiving said mounting flange and for enclosing at least a portion of said motor, said housing portion including locating means for cooperating with said mounting flange to restrain said mounting flange moving in a rotational direction relative to said housing portion, and a plurality of resilient fingers extending from an interior wall or walls of said housing portion whereby upon insertion of said motor into said housing portion said mounting flange engages and deflects outwardly said resilient fingers which return to their original position after passage of said mounting flange and which engage a surface of said mounting flange to retain said motor in said housing portion.
  • said resilient fingers are integrally formed with and cut out of said wall or walls of said housing portion.
  • Fig. 1 is a side elevational view of a printer frame member in accordance with one embodiment of the present invention
  • Fig. 2 is a view taken on the line 2-2 of Fig. 1;
  • Fig. 3 is a view taken on the line 3-3 of Fig. 1;
  • Fig. 4 is a side elevational view of the printer frame member taken in the direction opposite from Fig. 1;
  • Fig. 5 is a view taken on the line 5-5 of Fig. 4;
  • Fig. 6 is a perspective view of a printer showing the motor mounting arrangement.
  • Fig. 1 is a side elevational view of a frame member 20 which provides the means for mounting a circular-shaped electric motor 22 in a printer 24, as illustrated in Fig. 6.
  • the frame member 20 is of unitary construction and preferably is made of plastic in a molding operation.
  • a preferred material for the member 20 is polycarbonate with 15% PTFE (polytetrafluoroethylene) and 15% carbon fiber to provide for electrostatic discharge grounding.
  • Another material that may be used is polycarbonate with 15% PTFE and 20% glass fiber.
  • the member 20 is a portion of the printer and is located in a left hand cavity 26 of the printer 24 and provides support and bearing means for other parts or elements of the printer.
  • the frame member 20 includes a plate portion 28 having a bearing opening 30 for a shaft (not shown) that is used to support a paper drive roller.
  • a second bearing opening 32 is provided for a shaft (also not shown) that is used to support a camming roller.
  • a third bearing 34 is provided in the plate portion 28 to support a pivot shaft (also not shown) .
  • the orientation and mechanism of the structure associated with the bearings 30, 32 and 34 are fully described in copending Application Serial No. 67,757, filed June 29, 1987.
  • the plate portion 28 provides supporting structure for record media thickness compensating mechanism which is described in the above-noted application.
  • the frame member 20 is formed to provide an enclosure-type configuration, as 35, of generally square shape that includes walls 36, 38, 40 and 42.
  • the walls 36, 38, 40 and 42 extend in an outward direction from the plate portion 28.
  • the top wall 36 ' and the bottom wall 40 are essentially the same form, and the right hand wall 38 and the left hand wall 42 are essentially the same form.
  • the lower right hand corner and the upper left hand corner of the enclosure 35 are provided with cutout portions, as 44 in wall 36, as 46 in wall 38, as 48 in wall 40, and as 50 in wall 42.
  • the cutout portions 46 and 48 bridge the walls 38 and 40, and the cutout portions 44 and 50 bridge the walls 36 and 42.
  • the wall 36 includes a finger 52 extending outwardly from a narrow portion 54 of the wall 36, and the wall 42 includes a like-formed finger 56 extending outwardly from a narrow portion 58 of the wall 42.
  • the wall 38 includes a finger 60 extending outwardly from a narrow portion 62 of the wall 38, and the wall 40 includes a like-formed finger 64 extending outwardly from a narrow portion 66 of the wall 40.
  • the fingers 52, 56, 60 and 64 are formed to incline slightly at an angle with respect to the walls so as to have the tip portions 68, 70, 72 and 74 positioned inwardly from the respective walls 36, 42, 38 and 40.
  • a pair of spaced lugs 76 and 78 are provided at the bottom of the frame member 20 to secure the member to the printer 24, and a bearing 80 is provided at the top of the member for a shaft (not shown) that is used to support the frame member 20 to other " parts of the printer.
  • An opening 82 is provided in the center of the enclosure 35 for the shaft 84 of the motor 22.
  • a journal 88 is provided adjacent the shaft 84 as an integral part of the frame member 20 for accommodating a driven member (not shown).
  • the motor 22 is inserted in an axial direction from the left in Fig. 3 and the motor mounting flange 86 bears against the fingers 52, 56, 60 and 64, and deflects the fingers outwardly from the center of the enclosure 35.
  • a pair of pilot studs 90 and 92 are provided as an integral part of the floor portion 94 of the enclosure 35.
  • the motor mounting flange 86 has a pair of apertures 96 and 98 for receiving the pilot studs 90 and 92 as the motor 22 is installed into the housing 35.
  • the tips 68, 70, 72 and 74 of the respective fingers 52, 56, 60 and 64 capture the edges of the motor mounting flange 86 and secure the motor 22 in place by snap action of the fingers in a direction back to their normal unrestrained position.
  • This structure and positioning of the parts eliminates any axial play between the motor 22 and the frame member 20 which may be caused by any clearance between the motor flange 86 and the snap fingers 52, 56, 60 and 64.
  • the bracket has a plurality of snap fingers that are engageable by the motor mounting flange and are biased upon insertion of the motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

A mounting structure for an electric motor (22) having a mounting flange (86). The apparatus includes a housing portion (35) to contain the mounting flange (86) of the motor (22) and to enclose substantially the motor (22). The housing portion (35) includes a pair of stud-like members (90, 92) for co-operation with matching apertures in the mounting flange (86) for securing the mounting flange (86) against rotational movement, and a plurality of resilient fingers (52, 56, 60, 64) for receiving and securing the mounting flange (86) in the housing portion (35).

Description

A MOUNTING STRUCTURE FOR AN ELECTRIC MOTOR
Technical Field
The present invention relates to a mounting structure for an electric motor having a mounting flange and more particularly, but not exclusively, to a mounting structure for mounting an electric motor to the frame of a printing apparatus.
It is known for a printing apparatus to require one or more electric motors to drive certain parts of the printing apparatus. In a dot matrix printer, for example, there is a requirement for a small motor to drive the print head carriage in recip¬ rocating manner. A second motor is used to drive the paper such as a receipt, a slip or a journal at the end of the printing operation.
The demands of certain printing operations place a high duty cycle on the drive motor and it is essential that the motor be secured and contained in an appropriate manner because the motor is relied upon for long lasting operation which may involve either continuous or intermittent duty.
The use of screws, bolts, nuts and the like is well-known for securing the motor mounting'flange to a side frame of the printing apparatus. Other fastening members have included self-tapping screws, for example, in plastic frames or serrated washers engaging the surface of metal frames.
One of the disadvantages of employing a number of such parts for securing the motor mounting flange to the side frame is that installation time'is generally high. Also if one of the parts is incorrectly installed or of poor quality it may work itself loose or fail and thereby permit undamped relative movement between the motor and side frame causing deleterious effects on the motor and its operational efficiency. An alternative type of motor support is described in U.S. Patent No. 4,625,134 which relates to a motor and associated gear train assembly in which the motor is held by a cradle having a base and legs with tabs which lock the cradle to the gear train housing.
One of the disadvantages of the above alternative type of motor support is that relative movement, such as of a rotational nature, between the motor and cradle may arise and vibrations created by the motor in operation may not be adequately damped.
Disclosure of the Invention
It is an object of the present invention to provide a mounting structure for an electric motor having a mounting flange, the structure having mount¬ ing means enabling the electric motor to be easily installed and when so installed to be securely positioned and resiliently restrained therein.
Thus according to the invention, there is provided a mounting structure having a mounting flange, characterized by a housing portion for receiving said mounting flange and for enclosing at least a portion of said motor, said housing portion including locating means for cooperating with said mounting flange to restrain said mounting flange moving in a rotational direction relative to said housing portion, and a plurality of resilient fingers extending from an interior wall or walls of said housing portion whereby upon insertion of said motor into said housing portion said mounting flange engages and deflects outwardly said resilient fingers which return to their original position after passage of said mounting flange and which engage a surface of said mounting flange to retain said motor in said housing portion. In a preferred embodiment said resilient fingers are integrally formed with and cut out of said wall or walls of said housing portion. Brief Description of the Drawing
One example of the invention will now be described, by way of example, with reference to the accompanying drawings, in which:
Fig. 1 is a side elevational view of a printer frame member in accordance with one embodiment of the present invention;
Fig. 2 is a view taken on the line 2-2 of Fig. 1;
Fig. 3 is a view taken on the line 3-3 of Fig. 1;
Fig. 4 is a side elevational view of the printer frame member taken in the direction opposite from Fig. 1;
Fig. 5 is a view taken on the line 5-5 of Fig. 4; and
Fig. 6 is a perspective view of a printer showing the motor mounting arrangement.
Best Mode for Carrying out the Invention
Fig. 1 is a side elevational view of a frame member 20 which provides the means for mounting a circular-shaped electric motor 22 in a printer 24, as illustrated in Fig. 6. The frame member 20 is of unitary construction and preferably is made of plastic in a molding operation. A preferred material for the member 20 is polycarbonate with 15% PTFE (polytetrafluoroethylene) and 15% carbon fiber to provide for electrostatic discharge grounding. Another material that may be used is polycarbonate with 15% PTFE and 20% glass fiber. The member 20 is a portion of the printer and is located in a left hand cavity 26 of the printer 24 and provides support and bearing means for other parts or elements of the printer.
The frame member 20 includes a plate portion 28 having a bearing opening 30 for a shaft (not shown) that is used to support a paper drive roller. A second bearing opening 32 is provided for a shaft (also not shown) that is used to support a camming roller. A third bearing 34 is provided in the plate portion 28 to support a pivot shaft (also not shown) . The orientation and mechanism of the structure associated with the bearings 30, 32 and 34 are fully described in copending Application Serial No. 67,757, filed June 29, 1987. The plate portion 28 provides supporting structure for record media thickness compensating mechanism which is described in the above-noted application.
The frame member 20 is formed to provide an enclosure-type configuration, as 35, of generally square shape that includes walls 36, 38, 40 and 42. The walls 36, 38, 40 and 42 extend in an outward direction from the plate portion 28. The top wall 36' and the bottom wall 40 are essentially the same form, and the right hand wall 38 and the left hand wall 42 are essentially the same form. The lower right hand corner and the upper left hand corner of the enclosure 35 are provided with cutout portions, as 44 in wall 36, as 46 in wall 38, as 48 in wall 40, and as 50 in wall 42. The cutout portions 46 and 48 bridge the walls 38 and 40, and the cutout portions 44 and 50 bridge the walls 36 and 42. The wall 36 includes a finger 52 extending outwardly from a narrow portion 54 of the wall 36, and the wall 42 includes a like-formed finger 56 extending outwardly from a narrow portion 58 of the wall 42. Likewise, the wall 38 includes a finger 60 extending outwardly from a narrow portion 62 of the wall 38, and the wall 40 includes a like-formed finger 64 extending outwardly from a narrow portion 66 of the wall 40. The fingers 52, 56, 60 and 64 are formed to incline slightly at an angle with respect to the walls so as to have the tip portions 68, 70, 72 and 74 positioned inwardly from the respective walls 36, 42, 38 and 40. A pair of spaced lugs 76 and 78 are provided at the bottom of the frame member 20 to secure the member to the printer 24, and a bearing 80 is provided at the top of the member for a shaft (not shown) that is used to support the frame member 20 to other"parts of the printer. An opening 82 is provided in the center of the enclosure 35 for the shaft 84 of the motor 22. A journal 88 is provided adjacent the shaft 84 as an integral part of the frame member 20 for accommodating a driven member (not shown).
The motor 22 is inserted in an axial direction from the left in Fig. 3 and the motor mounting flange 86 bears against the fingers 52, 56, 60 and 64, and deflects the fingers outwardly from the center of the enclosure 35. A pair of pilot studs 90 and 92 are provided as an integral part of the floor portion 94 of the enclosure 35. The motor mounting flange 86 has a pair of apertures 96 and 98 for receiving the pilot studs 90 and 92 as the motor 22 is installed into the housing 35. The tips 68, 70, 72 and 74 of the respective fingers 52, 56, 60 and 64 capture the edges of the motor mounting flange 86 and secure the motor 22 in place by snap action of the fingers in a direction back to their normal unrestrained position. This structure and positioning of the parts eliminates any axial play between the motor 22 and the frame member 20 which may be caused by any clearance between the motor flange 86 and the snap fingers 52, 56, 60 and 64.
It is thus seen that herein shown and described is a motor mounting bracket for use in a ' printer. The bracket has a plurality of snap fingers that are engageable by the motor mounting flange and are biased upon insertion of the motor.

Claims

1. A mounting structure for an electric motor (22) having a mounting flange (86), charact¬ erized by a housing portion (35) for receiving said mounting flange (86) and for enclosing at least a portion of said motor (22), said housing portion (35) including locating means (90, 92) for cooperating with said mounting flange (86) to restrain said mounting flange (86) moving in a rotational direction relative to said housing portion (35), and a plurality of re¬ silient fingers -(52, 56, 60, 64) extending from an interior wall or walls (36, 38, 40, 42) of said housing portion (35) whereby upon insertion of said motor (22) into said housing portion (35) said mounting flange (86) engages and deflects outwardly said resilient fingers (52,' 56, 60, 64) which return to their original position after passage of said mounting flange (86) and which engage a surface of said mounting flange (86) to retain said motor (22) in said housing portion (35).
2. A mounting structure according to claim 1, characterized in that said resilient fingers (52, 56, 60, 64) are integrally formed with and cut out of said wall or walls (36, 38, 59, 42) of said housing portion (35) .
3. A mounting structure according to claim 1 or claim 2, characterized in that said locating means (90, 92) includes a pair of stud-like members (90, 92) for co-operation within a pair of apertures (96, 98) of said mounting flange (86).
4. A mounting structure according to any one of claims 1 to 3, characterized in that said housing portion (35) is substantially square in shape and defines cutout portions (44, 46, 48, 50) at two opposite corners thereof.
5. A mounting structure according to claim 4, characterized in that said cutout portions (44, 46, 48, 50) bridge adjacent walls (36, 38, 40, 42) of said housing portion (35) and said resilient fingers (52, 56, 60, 64) are disposed in said adjacent walls (35, 38, 40, 42).
6. A mounting structure according to any one of claims 1 to 5, characterized by a pair of spaced lugs (76, 78) and bearing means (80) spaced from said lugs (76, 78) for supporting said mounting structure from a printing apparatus (24).
7. A mounting structure as claimed in any one of claims 1 to 6, characterized in that said housing portion (35) includes a journal member (88) disposed adjacent the centre of said housing portion (35).
8. A mounting structure as claimed in any one of claims 1 to 7, characterized in that said structure is moulded of polycarbonate materials in¬ corporating polytetrafluoroethylene and carbon fiber.
9. A mounting structure as claimed in any one of claims 1 to 7, characterized in that said structure is moulded of polycarbonate material incorporating polytetrafluoreothylene and glass fiber.
10. A mounting structure as claimed in any one of claims 1 to 9, characterized in that said resilient fingers (52, 56, 60, 64) are arranged such that after passage of said mounting flange (86) they exert a restraining force against said surface of said mounting flange (86).
PCT/US1989/000899 1988-03-28 1989-03-06 A mounting structure for an electric motor WO1989009509A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/174,731 US4832306A (en) 1988-03-28 1988-03-28 Motor mounting bracket
US174,731 1988-03-28

Publications (1)

Publication Number Publication Date
WO1989009509A1 true WO1989009509A1 (en) 1989-10-05

Family

ID=22637285

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1989/000899 WO1989009509A1 (en) 1988-03-28 1989-03-06 A mounting structure for an electric motor

Country Status (5)

Country Link
US (1) US4832306A (en)
EP (1) EP0363462B1 (en)
JP (1) JP2739183B2 (en)
DE (1) DE68907000T2 (en)
WO (1) WO1989009509A1 (en)

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US8469199B2 (en) 2004-09-15 2013-06-25 Metso Minerals (Sweden) Ab Screen and screen element

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US5657066A (en) * 1992-10-02 1997-08-12 Zebra Technologies Corporation Thermal demand printer
JPH03161379A (en) * 1989-11-20 1991-07-11 Fujitsu Ltd Printer drive power transmission device
IT232389Y1 (en) * 1994-05-05 1999-12-17 Bitron A Spa ELECTROMECHANICAL ACTUATOR AND ENCLOSURE FOR SUPPORT AND CONTAINMENT.
US5604645A (en) * 1995-03-17 1997-02-18 United Technologies Automotive Systems Mirror motor mounting bracket
DE50010566D1 (en) * 2000-07-26 2005-07-21 Abb Turbo Systems Ag Baden Device for attaching a turbocharger
US7918204B2 (en) * 2006-10-11 2011-04-05 Ti Group Automotive Systems, L.L.C. Mounting bracket
JP5823743B2 (en) 2011-06-22 2015-11-25 富士通コンポーネント株式会社 Thermal printer
US9172283B2 (en) 2012-01-17 2015-10-27 Regal Beloit America, Inc. Electric motor
US10951085B2 (en) * 2017-03-13 2021-03-16 Seiko Epson Corporation Recording apparatus

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FR2118910A1 (en) * 1970-12-23 1972-08-04 Bassani Spa
FR2520844A1 (en) * 1982-02-03 1983-08-05 Chausson Usines Sa SUPPORT FOR MISCELLANEOUS MECHANISMS OF MOTOR-VENTILATORS, COMPRESSORS, PUMPS AND THE LIKE
EP0166131A2 (en) * 1984-06-11 1986-01-02 International Business Machines Corporation Electric motor mounting apparatus
EP0193794A2 (en) * 1985-03-08 1986-09-10 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co. KG Fastening device for small motors

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US4155020A (en) * 1977-10-18 1979-05-15 Sundstrand Corporation Snap-fit fastening system for attaching member to an electric motor
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US4410160A (en) * 1982-04-22 1983-10-18 Albrass Enterprises, Inc. Means and method for attaching fan and fixture units or the like substantially flush with a ceiling
US4625134A (en) * 1985-03-25 1986-11-25 Emhart Industries, Inc. Means for mounting a gear train and motor
US4676473A (en) * 1985-06-03 1987-06-30 Truckers Comfort Systems, Inc. Compressor mounting bracket
US4657478A (en) * 1985-12-02 1987-04-14 Airmaster Fan Company Low profile shrouded fan system
US4780007A (en) * 1987-06-29 1988-10-25 Ncr Corporation Record media thickness compensating mechanism

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3329785A (en) * 1963-10-09 1967-07-04 Gen Motors Corp Rectangular conductor harness means and attachments
FR2118910A1 (en) * 1970-12-23 1972-08-04 Bassani Spa
FR2520844A1 (en) * 1982-02-03 1983-08-05 Chausson Usines Sa SUPPORT FOR MISCELLANEOUS MECHANISMS OF MOTOR-VENTILATORS, COMPRESSORS, PUMPS AND THE LIKE
EP0166131A2 (en) * 1984-06-11 1986-01-02 International Business Machines Corporation Electric motor mounting apparatus
EP0193794A2 (en) * 1985-03-08 1986-09-10 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co. KG Fastening device for small motors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8469199B2 (en) 2004-09-15 2013-06-25 Metso Minerals (Sweden) Ab Screen and screen element

Also Published As

Publication number Publication date
DE68907000D1 (en) 1993-07-15
EP0363462B1 (en) 1993-06-09
JPH02503742A (en) 1990-11-01
EP0363462A1 (en) 1990-04-18
US4832306A (en) 1989-05-23
JP2739183B2 (en) 1998-04-08
DE68907000T2 (en) 1994-01-27

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